// ~->[DNET-1]->~

// File created by Norsys using Netica 1.05a on Feb 06, 1998 at 05:04:02.

bnet SpiegelhalterDLC93 {
comment = "A 20 node example of a belief net for medical diagnosis. \n\
	This file does not contain the numerical probabilities \
	(except those few given in the paper). \n\
	This, together with the paper, provide a good worked out \
	example for clique tree (i.e. join tree) compiling and \
	propagation. \n\
	From: Spiegelhalter, David J., A. Philip Dawid, Steffen L. \
	Lauritzen and Robert G. Cowell (1993) \"Bayesian analysis in \
	expert systems\" in Statistical Science, 8(3), 219-283.";
whenchanged = 785710983;

visual V1 {
	defdispform = LABELBOX;
	nodelabeling = NAMETITLE;
	nodefont = font {shape= "Arial"; size= 10;};
	linkfont = font {shape= "Arial"; size= 9;};
	commentfont = font {shape= "Arial"; size= 10;};
	windowposn = (41, 91, 633, 458);
	resolution = 72;
	drawingbounds = (1104, 730);
	showpagebreaks = FALSE;
	usegrid = TRUE;
	gridspace = (6, 6);
	};

node n1 {
	kind = NATURE;
	discrete = TRUE;
	chance = CHANCE;
	states = (yes, no);
	parents = ();
	title = "Birth\nasphyxia?";
	visual V1 {
		center = (258, 36);
		height = 5;
		};
	};

node n2 {
	kind = NATURE;
	discrete = TRUE;
	chance = CHANCE;
	states = (PFC, TGA, Fallot, PAIVS, TAPVD, Lung);
	parents = (n1);
	title = "Disease?";
	visual V1 {
		center = (258, 90);
		height = 1;
		};
	};

node n9 {
	kind = NATURE;
	discrete = TRUE;
	chance = CHANCE;
	states = (yes, no);
	parents = (n2);
	title = "Sick?";
	visual V1 {
		center = (492, 156);
		height = 3;
		link 1 {
			path = ((290, 100), (461, 147));
			};
		};
	};

node n3 {
	kind = NATURE;
	discrete = FALSE;
	chance = CHANCE;
	levels = (0, 4, 11, 30);
	parents = (n2, n9);
	title = "Age at\npresentation";
	visual V1 {
		center = (492, 90);
		height = 4;
		};
	};

node n8 {
	kind = NATURE;
	discrete = TRUE;
	chance = CHANCE;
	states = (Normal, Low, High);
	parents = (n2);
	title = "Lung\nflow?";
	visual V1 {
		center = (402, 156);
		height = 6;
		};
	};

node n7 {
	kind = NATURE;
	discrete = TRUE;
	chance = CHANCE;
	states = (Normal, Oedema, Abnormal);
	parents = (n2);
	title = "Lung\nparenchema?";
	visual V1 {
		center = (312, 156);
		height = 18;
		};
	};

node n6 {
	kind = NATURE;
	discrete = TRUE;
	chance = CHANCE;
	states = (None, Mild, Complete, Transp);
	parents = (n2);
	title = "Cardiac\nmixing";
	visual V1 {
		center = (222, 156);
		height = 10;
		};
	};

node n5 {
	kind = NATURE;
	discrete = TRUE;
	chance = CHANCE;
	states = (Lt_to_Rt, None, Rt_to_Lt);
	parents = (n2);
	title = "Duct\nflow";
	visual V1 {
		center = (132, 156);
		height = 16;
		link 1 {
			path = ((244, 99), (159, 143));
			};
		};
	};

node n4 {
	kind = NATURE;
	discrete = TRUE;
	chance = CHANCE;
	states = (yes, no);
	parents = (n2);
	probs = 
		// yes          no             // n2     
		 ((0.1,         0.9),          // PFC    
		  (0.1,         0.9),          // TGA    
		  (0.1,         0.9),          // Fallot 
		  (0.9,         0.1),          // PAIVS  
		  (0.05,        0.95),         // TAPVD  
		  (0.1,         0.9));         // Lung   ;
	title = "LVH?";
	visual V1 {
		center = (54, 156);
		height = 17;
		link 1 {
			path = ((234, 99), (79, 148));
			};
		};
	};

node n14 {
	kind = NATURE;
	discrete = TRUE;
	chance = CHANCE;
	states = (yes, no);
	parents = (n7, n9);
	title = "Grunting?";
	visual V1 {
		center = (492, 222);
		height = 8;
		};
	};

node n13 {
	kind = NATURE;
	discrete = TRUE;
	chance = CHANCE;
	states = (Normal, Oligaemic, Plethoric, Grd_Glass, Asy_Patchy);
	parents = (n7, n8);
	title = "Chest\nX-ray?";
	visual V1 {
		center = (402, 222);
		height = 9;
		};
	};

node n11 {
	kind = NATURE;
	discrete = TRUE;
	chance = CHANCE;
	states = (None, Moderate, Severe);
	parents = (n6, n7);
	title = "Hypoxia\nin O2?";
	visual V1 {
		center = (222, 222);
		height = 11;
		};
	};

node n12 {
	kind = NATURE;
	discrete = TRUE;
	chance = CHANCE;
	states = (Normal, Low, High);
	parents = (n7);
	title = "CO2?";
	visual V1 {
		center = (312, 222);
		height = 19;
		};
	};

node n10 {
	kind = NATURE;
	discrete = TRUE;
	chance = CHANCE;
	states = (Equal, Unequal);
	parents = (n5, n6);
	title = "Hypoxia\ndistribution?";
	visual V1 {
		center = (132, 222);
		height = 15;
		};
	};

node n15 {
	kind = NATURE;
	discrete = TRUE;
	chance = CHANCE;
	states = (yes, no);
	parents = (n4);
	probs = 
		// yes          no             // n4  
		 ((0.9,         0.1),          // yes 
		  (0.05,        0.95));        // no  ;
	title = "LVH\nreport?";
	visual V1 {
		center = (54, 294);
		height = 14;
		};
	};

node n20 {
	kind = NATURE;
	discrete = TRUE;
	chance = CHANCE;
	states = (yes, no);
	parents = (n14);
	title = "Grunting\nreport?";
	visual V1 {
		center = (492, 294);
		height = 2;
		};
	};

node n19 {
	kind = NATURE;
	discrete = TRUE;
	chance = CHANCE;
	states = (Normal, Oligaemic, Plethoric, Grd_Glass, Asy_Patchy);
	parents = (n13);
	title = "X-ray\nreport?";
	visual V1 {
		center = (402, 294);
		height = 7;
		};
	};

node n17 {
	kind = NATURE;
	discrete = FALSE;
	chance = CHANCE;
	levels = (-INFINITY, 5, 12, INFINITY);
	parents = (n11);
	title = "Right\nup. quad. O2?";
	visual V1 {
		center = (222, 294);
		height = 12;
		};
	};

node n16 {
	kind = NATURE;
	discrete = FALSE;
	chance = CHANCE;
	levels = (-INFINITY, 5, 12, INFINITY);
	parents = (n10, n11);
	title = "Lower\nbody O2?";
	visual V1 {
		center = (132, 294);
		height = 13;
		};
	};

node n18 {
	kind = NATURE;
	discrete = FALSE;
	chance = CHANCE;
	levels = (-INFINITY, 7.5, INFINITY);
	parents = (n12);
	title = "CO2\nreport?";
	visual V1 {
		center = (312, 294);
		height = 20;
		};
	};
};